Draft turbine



W. S. COLEMAN DRAFT TURBINE Nov. 29, 1927. 1,651,054

Filed April 21, 1926 2 Sheets-Sheet l 61am a; a

Nov. 29, 1927. v 1,651,054 W. S. COLEMAN DRAFT TURBINE Filed April 192s Z'Sheet's-Sheet 2 ,Z QHZ.

Patented Nov. 29, 192.7.

UNHTED STATES WILLIAM S. COLEMAN, 0F MIDLAND, I ENNSYLVANIA.

DRAFT TURBINE.

Application filed. April 21, 1926.

This invention aims to provide a simple but efiective turbine which will operate by a draft of air, produced when the device is mounted on a moving vehicle, or produced under favorable conditions, when the device is stationary.

It is within the province of the disclosure to improve generally and to enhance the utility of devices of that type to which the invention appertains.

With the above and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, may be made within the scope of what is claimed, without departing from the spirit of the invention.

In the drawings Figure 1 shows in end elevation, a device constructed in accordance with the invention; and

Figure 2 is a vertical longitudinal section.

In carrying out the invention, there is provided a frame or casing, which is denoted generally by the numeral 1. The frame or casing 1 embodies side members 2, in' the form of plates, held by securing elements 3 on a base 4, there being a space 5 between the plates 2.

A shaft 6 is journaled for rotation in antifriction bearings 30 mounted in the plates 2 and the shaft carries a wind wheel 7 located in the space 5 between the plates 2. The wheel 7 is made up of heads 8, joined by a rim 9. An annular partition 10 is secured to the rim 9 and is located mid-way between the plates 2. Blades 12 are joined to the rim 9 and to the partition 10. The blades 12 on opposite sides of the partition 10 are staggered with respect to each other, as Figure 1 will disclose, the blades slanting, circumferentially of the wheel, from the sides of the wheel to the partition 10. The parts 12, 10, and 9 coact to form pockets 14 on the periphery of the wheel 7, the pockets being open at the sides of the wheel.

A plate or wall 15 extends about one-half the way around the periphery of the wheel 7 and is united by securing elements 16 with the side plates 2. A trough-shaped hood 17 extends part-way around the periphery of the Wheel 7 and is held in place Serial No. 103,556.

on the wall 15 by the aforesaid securing elements 16. At its lower end, the hood 17 and the plate 15 cooperate to form a reduced throat 18 discharging into the pockets 14 of the wheel 7. The curvature of the parts 15 and 17 is such that there is formed, about a portion of the periphery of the wheel 7, a chamber 28 which tapers from its intake end 27 to its opposite end 18. In the plate or wall 15 are mounted funnelshaped nozzles 19. These nozzles 19 slope circumferentially of the wheel, as shown in Figure 2, and, also, they incline toward the median plane of the wheel 7, as clearly shown in Figure 1 of the drawings. The nozzles 19 discharge into the pockets 14 of the wheel 7. A plurality of deflectors 20,

of elongated spiral form, are mounted longitndinally in the chamber 28, at the intake end 27 thereof, and are secured to the hood 17. The deflectors 20 serve to distribute the air as it enters the chamber 28 and to deliver the air fairly to the funnel-shaped nozzles 19. From the nozzles 19, the air is delivered into the pockets 14 of the wheel 7, mot-ion being transmitted to the shaft 6, and power being taken off the shaft for any purpose for which the machine is adapted. The throat 18 enhances the draft through the chamber 28, and the discharge through the throat aids' in turning the wheel 7.

WVhat is claimed is In a device of the class described, a frame; a wheel journaled on the frame and provided with circumferential rows of pockets located side by side; a chamber mounted on the frame and extended part-way around the wheel, the chamber tapering longitudinally toward its inner end, lines of funnelshaped nozzles mounted in one wall of the chamber, the nozzles in each line being spaced apart circumferentially of the wheel, the lines of nozzles discharginginto the respective rows of pockets, the lines of nozzles being spaced apart transversely of the wheel; and spiral deflectors mounted in the outer end of the chamber and extended longitudinally of the chamber, the deflectors serving to give a whirling motion to the air as it enters the chamber, thereby to distribute the air fairly amongst the nozzles of the transversely spaced lines.

In testimony that I claim the foregoing as my own, I have hereto afiixed my signature.

WILLIAM S. COLEMAN. 

